<?php

/**
 * abook_local_file.php
 *
 * Copyright (c) 1999-2002 The Squirrelmail Project Team
 * Licensed under the GNU GPL. For full terms see the file COPYING.
 *
 * Backend for addressbook as a pipe separated file
 *
 * An array with the following elements must be passed to
 * the class constructor (elements marked ? are optional):
 *
 * NOTE. This class should not be used directly. Use the
 *       "AddressBook" class instead.
 *
 * Make sure you configure this before using it!
 *
 * $Id$
 */

/*****************************************************************/
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/*** PLEASE DO SO AND REMOVE THIS COMMENT SECTION.             ***/
/***    + Base level indent should begin at left margin, as    ***/
/***      the first line of the class definition below.        ***/
/***    + All identation should consist of four space blocks   ***/
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/***      style -- no pound characters, no slash-slash style   ***/
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/***      ALWAYS USE { AND } CHARACTERS!!!                     ***/
/***    + Please use ' instead of ", when possible. Note "     ***/
/***      should always be used in _( ) function calls.        ***/
/*** Thank you for your help making the SM code more readable. ***/
/*****************************************************************/

class abook_global_file extends addressbook_backend {
    var $btype = 'local';
    var $bname = 'global_file';

     var $filehandle = 0;

     // ========================== Private =======================

     // Constructor
     function abook_global_file() {
       global $address_book_global_filename;
       $this->global_filename = $address_book_global_filename;
     
       $this->sname = _("Global address book");

       $this->open(true);
     }

     // Open the addressbook file and store the file pointer.
     // Use $file as the file to open, or the class' own 
     // filename property. If $param is empty and file is  
     // open, do nothing.
     function open($new = false) {
       $this->error = '';

       // Return true is file is open and $new is unset
       if($this->filehandle && !$new)
	 return true;

       // Check that new file exists
       if (! file_exists($this->global_filename) || 
           ! is_readable($this->global_filename))
	 return $this->set_error($this->global_filename . ': ' .
	    _("No such file or directory"));

       // Close old file, if any
       if ($this->filehandle) $this->close();
       
       // Open file, read only.
       $fh = @fopen($this->global_filename, 'r');
       $this->writeable  = false;
       if(! $fh)
         return $this->set_error($this->global_filename . ': ' . 
	    _("Open failed"));

       $this->filehandle = &$fh;
       return true;
     }

     // Close the file and forget the filehandle
     function close() {
       @fclose($this->filehandle);
       $this->filehandle = 0;
       $this->global_filename   = '';
       $this->writable   = false;
     }

     // ========================== Public ========================
     
     // Search the file
     function search($expr) {

       // To be replaced by advanded search expression parsing
       if(is_array($expr)) return;

       // Make regexp from glob'ed expression
       // May want to quote other special characters like (, ), -, [, ], etc.
       $expr = str_replace('?', '.', $expr);
       $expr = str_replace('*', '.*', $expr);

       $res = array();
       if(!$this->open())
	 return false;

       @rewind($this->filehandle);
       
       while ($row = @fgetcsv($this->filehandle, 2048, '|')) {
	 $line = join(' ', $row);
	 if (eregi($expr, $line)) {
	   $res[] = array('nickname'  => $row[0],
	                  'name'      => $row[1] . ' ' . $row[2],
			  'firstname' => $row[1],
			  'lastname'  => $row[2],
			  'email'     => $row[3],
			  'label'     => $row[4],
			  'backend'   => $this->bnum,
			  'source'    => &$this->sname);
	 }
       }
       
       return $res;
     }
     
     // Lookup alias
     function lookup($alias) {
       if (empty($alias))
	 return array();

       $alias = strtolower($alias);
       
       $this->open();
       @rewind($this->filehandle);
       
       while ($row = @fgetcsv($this->filehandle, 2048, '|')) {
	 if (strtolower($row[0]) == $alias) {
	   return array('nickname'  => $row[0],
			'name'      => $row[1] . ' ' . $row[2],
			'firstname' => $row[1],
			'lastname'  => $row[2],
			'email'     => $row[3],
			'label'     => $row[4],
			'backend'   => $this->bnum,
			'source'    => &$this->sname);
	 }
       }
       
       return array();
     }

     // List all addresses
     function list_addr() {
       $res = array();
       $this->open();
       @rewind($this->filehandle);
       
       while ($row = @fgetcsv($this->filehandle, 2048, '|')) {
	 $res[] = array('nickname'  => $row[0],
			'name'      => $row[1] . ' ' . $row[2],
			'firstname' => $row[1],
			'lastname'  => $row[2],
			'email'     => $row[3],
			'label'     => $row[4],
			'backend'   => $this->bnum,
			'source'    => &$this->sname);
       }
       return $res;
     }

     // Add address
     function add($userdata) {
       $this->set_error(_("Can not modify global address book"));
       return false;
     }

     // Delete address
     function remove($alias) {
       $this->set_error(_("Can not modify global address book"));
       return false;
     }

     // Modify address
     function modify($alias, $userdata) {
       $this->set_error(_("Can not modify global address book"));
       return false;
     }
     
   } // End of class abook_local_file
?>